At the heart of the controversy is Jane Street’s aggressive trading in the derivatives (futures) segment, where the firm executed trades designed not just to profit, but to sway the market itself. Here's how.

India's markets regulator has widened an investigation into alleged market manipulation by U.S. securities trading firm Jane Street to include other indexes and exchanges, a source familiar with the matter said.

SEBI has temporarily barred Jane Street from the Indian stock market and impounded ₹4,840 crore for alleged index manipulation, raising concerns about retail traders' vulnerabilities in derivatives trading.